A study of slow-mode structures in the dayside magnetosheath

Details A study of slow-mode structures in the dayside magnetosheath A study of slow-mode structures in the dayside magnetosheath

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..381l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, March 1991, p. 381-384. NASA-supported research.

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23

Earth Magnetosphere, Magnetic Field Configurations, Magnetopause, Magnetosheath, Plasma Pressure, Incompressible Flow, Interplanetary Magnetic Fields, Magnetohydrodynamic Flow, Stagnation Flow

Scientific paper

Recent observations indicate that a region of enhanced plasma pressure and decreased magnetic field intensity frequently occurs in front of the plasma depletion layer at the dayside magnetopause (Song et al., 1990). This inverse relationship is characteristic of a slow-mode wave. This phenomenon was simulated with a two-dimensional incompressible MHD simulation code. When a normal component of the interplanetary magnetic field is present (Bx not equal to 0), the total magnetic field intensity tends to decrease in front of the depletion layer due to the bending of the magnetic field lines, and the plasma pressure is enhanced in this region. On the other hand, when Bx = 0, this slow-mode structure is not present in the simulation and only the plasma depletion layer is observed.

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